i would use it.
but even at 13c a kwh 3.5TH @ 1100 watts is profitable.. will be probably until the halving..

Its an 4.1 -> 700 Watts and 1.3THs (0.53J/GH). So with 13 cents/KWh it costs $2.15 a day and mines only 1.65 -> so 50 cents are lost a day. Of course a 200% kano day is helping a lot... under normal conditions you need at least 0.06 / KWh to run that thing without a loss.
edit: typos
oh i didn't catch the specs.. yes you need free electricity for this one..